At the end of the three cubes, you will need to jump on this cube here to make it onto the branch with the first portal.

Second Teleport Portal: Get through these two log traps, run on the inner wall so you don't get knocked off.

Third Teleport Portal: The third teleport portal is not the portal immediately in front of you after you get through the second portal but rather a portal to you left that you will need to make a couple jumps. The portal is a bit hard to activate so you may need to get to the other side of the pillar.